With this Style, the titles from the 'Sites' hidden. The Border is much thiner, and on hover the transparency is 0%.You can edit all the values in the code, how you like it.It works much better with Hardware-Acceleration turned on on Firefox.

If you want set a backgroundpicture, use the settings of Speedial.

To use this style, install Firefox and Stylish. If you already have Stylish, make sure this site is allowed to run JavaScript.